EF5 – Fineness of Grind Factor – this applies to fine grinding when the 80% passing size of the product is finer than 75 micrometers (200 mesh). The equation to determine this is:
EF5 = P + 10.3 / 1.145P
This applies when you are asking a given machine to grind finer than its design operating range. Every machine has its purpose and going outside that ... will cost you in efficiency.
